Propelling mechanism for boats.



G. S. BECKMAN. PBOPBLLING MECHANISM FOR BOATS.

APPLICATION FILED JUNE 14, 1912.

Patented June 2, 1914.

2 SHEBTS-SHEET 1.

INVENTOR 7 1! 43 ha ATTORNEY WITNESSES G. S. BEGKMAN.

PROPELLING MECHANISM FOR BOATS.

APPLICATION FILED JUNE 14, 1912. 1,098,467. Patented June 2, 1914.

2 SHEETSSHEET 2.

[NVE TOR Z 4 w i 5! t I Attorney WITNESSES COLUMBIA PLANDGRAPH COHWASHINGTONI D c.

GUSTAF SIGFRID IBECKMATN, OF PROVIDENCE, RHODE ISLAND.

PROPELLING MECHANISM FOR- BOATS.

Specification of Letters Patent.

Patented June 2, 1914.

Application filed June 1-4, 1912. Serial No. 703,636.

To all whom it may concern:

Be it known that I, GUSTAF S. BECKMAN, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented new and useful Improvements in Propelling Mechanism for Boats, of which the following is a specification.

This invention relates to new and useful improvements in means for manually propelling boats and the primary object of this invention is to provide a simple and compact means which will take up comparatively little space.

With these and other objects in view this invention consists of the novel construction,

combination, formation and arrangement of parts as will be hereinafter more fully de scribed, claimed and particularlypointed out in the appended drawings in which,

Figure 1 is a vertically longitudinally extending section taken through a boat showing my improved mechanism in a side elevation. Fig. 2 is a horizontal section taken through the gear casing showing my improved mechanism in plan view as applied to a boat, which is shown in dotted lines.

Referring now more particularly to the drawings wherein like parts are indicated by like references throughout the several views the numeral 10 indicates an ordinary boat or craft having mounted on the stern end thereof the usual rudder 11 and mount ed within the center of the boat is a gear casing 12 having mounted therein my improved propelling mechanism for propelling the usual propeller 18 in the usual and well known way. Mounted within the casing 12 are four transversely mounted shafts 14, 15, 16 and 17 respectively. Mounted upon the forward shaft 14 are gear wheels 18 and 19. The gear 18 is keyed upon said shaft and the other gear wheel 19 is loosely mounted and has formed thereon a gear wheel 20 of less diameter, the use of which will he hereinafter more fully described. The second shaft 15 has mounted thereon two gear wheels 21 and 23. The gear 21 is loosely mounted on the shaft and has formed therewith a smaller gear wheel 22 which meshes with the loosely mounted large gear 19 mounted on the forward shaft 1 1. The other gear 23 is keyed upon the shaft 15 and meshes with the smaller gear 20 mounted on the forward shaft and has also formed thereon a small gear 2 1 which is adapted to mesh with the large gear 18 formed on the said forward shaft. The aforesaid large gears are of the same diameter and the smaller gears are also of the same diameter. These gears meshing together as before illustrated overcome any dead centers which will be caused by oscillating the lovers which are to be hereinafter more fully described. The third shaft 16 has mounted thereon two gear wheels 25 and 26 respectively. The wheel 25 is adapted to mesh with the gear 21 mounted on the adjoining shaft 15 and is of smaller diameter than the gear 21 whereby when the gear 21 is making one rotation the smaller gear will make several rotations thereby increasing the speed of the pro peller. The second gear 26 which is mounted on the shaft 16 is adapted to mesh with the smaller gear 27 which is keyed to the shaft 17 whereby when the gear 26 makes one rotation the said smaller gear will make several rotations thereby further increasing the speed of the propeller.

A. propeller shaft 28 is mounted within the boat in the usual and well known manner and is supported within the gear casing by means of the bracket 29, this propeller shaft having mounted thereon a fly wheel 30 so as to increase the power of the motor when it has acquired a certain amount of momentum. Mounted on one extremity of this propeller shaft is the propeller blade 13, on the opposite extremity is mounted a beveled gear 31 which is adapted to mesh with the beveled gear 32 mounted upon the shaft 16 which will transmit the proper motion to the said propeller shaft from the rotation of the aforesaid gears. At the forward extremity of the gear casing and at each side thereof are operating levers 33 which are pivotally mounted in brackets S 1 at one end thereof and the opposite ends are rounded in any preferred or well known manner to form hand grips 35. Pivotally mounted below the central portion of each of said levers are links 36 which are pivotally connected to crank arms 87. These crank arms are formed on the extremities of the forward. shaft 1 1 which is mounted in the gear casing. An operators seat 38 is mounted on the gear casing 12 where the operator may sit in propelling the boat.

It will be seen from the foregoing description taken in connection with the accompanying drawings that when the operator oscillates the said levers alternately the shaft 14: will be rotated. Rotary motion is transmitted to the propeller shaft through the aforesaid mentioned gears thereby r0- tating the propeller blades which will supply the necessary power for propelling the oat.

A particular advantage of this invention resides in the fact that the arrangement of the gears mounted upon the shafts 14 and 15 prevents the mechanism from coming to a stop upon a dead center.

It will be seen from the foregoing clescription that I have constructed a device whereby boats may be easily manually propelled and at the same time overcome the many disadvantages found in the present art.

It is to be understood that other minor details of construction may be resorted to that come within the scope of the appended claim without departing from the spirit of the present invention.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is In a propelling means of the character described a casing, a driving shaft rotatably mounted in said casing, driven shafts rotatably mounted in said casing, a propeller shaft rotatably connected with said casing, a rela-' tively large gear wheel rigidly mounted upon said driving shaft, a relatively large gear wheel loosely mounted upon said driving shaft, a relatively small gear wheel loosely mounted upon said driving shaft rigidly secured to said loosely mounted gear wheel, a relatively large gear wheel rigidly mounted upon one of said driven shafts and meshing with the relatively small gear wheel of said driving shaft, a relatively small gear wheel carried by the relatively large gear wheel of said driven shaft and meshing with the rigidly mounted relatively large gear wheel of said driving shaft, a relatively large gear wheel loosely mounted upon said driven shaft, a relatively small gear wheel loosely mounted upon said driven shaft and rigidly secured to the loosely mounted relatively large gear wheel of said driven shaft and meshing with the loosely mounted relatively large gear wheel of'said driving shaft, a gear wheel rigidly mounted upon a second driven shaft and meshing with the loosely mounted relatively large gear wheel of said first-mentioned driven shaft, means for transmitting rotary motion from said secondmentioned driven shaft to a third driven shaft, and means for transmitting rotary motion from said last-mentioned driven shaft to said propeller shaft.

GUSTAF SIGFRID BECKMAN. WVitnesses:

VERNER TRANBERG, CARL JoHNsoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

